Johnson township represents an area within the Johnson township subdivision of the Clark County (Illinois),
which is not part of any official city, town or other place of the Johnson township subdivision.
This area is populated by approximatelly 383 people and occupies the area of 38 square miles - 1 square miles represent water areas.
Racial makeup of the population is : White (98.17%), Asian (0.78%) and Black or African American (0.52%).
The male part of the population has a median age of 45 and the “median female” is 42 years old.
Statistical data for the Johnson township based on the 2010 U.S. Census